1*91f16700Schasinglulu /* 2*91f16700Schasinglulu * Copyright (c) 2017, ARM Limited and Contributors. All rights reserved. 3*91f16700Schasinglulu * 4*91f16700Schasinglulu * SPDX-License-Identifier: BSD-3-Clause 5*91f16700Schasinglulu */ 6*91f16700Schasinglulu 7*91f16700Schasinglulu #include <platform_def.h> 8*91f16700Schasinglulu 9*91f16700Schasinglulu #include <arch.h> 10*91f16700Schasinglulu #include <lib/psci/psci.h> 11*91f16700Schasinglulu 12*91f16700Schasinglulu /* 13*91f16700Schasinglulu * The HiKey power domain tree descriptor. The cluster power domains 14*91f16700Schasinglulu * are arranged so that when the PSCI generic code creates the power 15*91f16700Schasinglulu * domain tree, the indices of the CPU power domain nodes it allocates 16*91f16700Schasinglulu * match the linear indices returned by plat_core_pos_by_mpidr(). 17*91f16700Schasinglulu */ 18*91f16700Schasinglulu const unsigned char hikey_power_domain_tree_desc[] = { 19*91f16700Schasinglulu /* Number of root nodes */ 20*91f16700Schasinglulu 1, 21*91f16700Schasinglulu /* Number of clusters */ 22*91f16700Schasinglulu PLATFORM_CLUSTER_COUNT, 23*91f16700Schasinglulu /* Number of children for the first cluster node */ 24*91f16700Schasinglulu PLATFORM_CORE_COUNT_PER_CLUSTER, 25*91f16700Schasinglulu /* Number of children for the second cluster node */ 26*91f16700Schasinglulu PLATFORM_CORE_COUNT_PER_CLUSTER, 27*91f16700Schasinglulu }; 28*91f16700Schasinglulu 29*91f16700Schasinglulu /******************************************************************************* 30*91f16700Schasinglulu * This function returns the HiKey topology tree information. 31*91f16700Schasinglulu ******************************************************************************/ 32*91f16700Schasinglulu const unsigned char *plat_get_power_domain_tree_desc(void) 33*91f16700Schasinglulu { 34*91f16700Schasinglulu return hikey_power_domain_tree_desc; 35*91f16700Schasinglulu } 36*91f16700Schasinglulu 37*91f16700Schasinglulu /******************************************************************************* 38*91f16700Schasinglulu * This function implements a part of the critical interface between the psci 39*91f16700Schasinglulu * generic layer and the platform that allows the former to query the platform 40*91f16700Schasinglulu * to convert an MPIDR to a unique linear index. An error code (-1) is returned 41*91f16700Schasinglulu * in case the MPIDR is invalid. 42*91f16700Schasinglulu ******************************************************************************/ 43*91f16700Schasinglulu int plat_core_pos_by_mpidr(u_register_t mpidr) 44*91f16700Schasinglulu { 45*91f16700Schasinglulu unsigned int cluster_id, cpu_id; 46*91f16700Schasinglulu 47*91f16700Schasinglulu mpidr &= MPIDR_AFFINITY_MASK; 48*91f16700Schasinglulu 49*91f16700Schasinglulu if (mpidr & ~(MPIDR_CLUSTER_MASK | MPIDR_CPU_MASK)) 50*91f16700Schasinglulu return -1; 51*91f16700Schasinglulu 52*91f16700Schasinglulu cluster_id = (mpidr >> MPIDR_AFF1_SHIFT) & MPIDR_AFFLVL_MASK; 53*91f16700Schasinglulu cpu_id = (mpidr >> MPIDR_AFF0_SHIFT) & MPIDR_AFFLVL_MASK; 54*91f16700Schasinglulu 55*91f16700Schasinglulu if (cluster_id >= PLATFORM_CLUSTER_COUNT) 56*91f16700Schasinglulu return -1; 57*91f16700Schasinglulu 58*91f16700Schasinglulu /* 59*91f16700Schasinglulu * Validate cpu_id by checking whether it represents a CPU in 60*91f16700Schasinglulu * one of the two clusters present on the platform. 61*91f16700Schasinglulu */ 62*91f16700Schasinglulu if (cpu_id >= PLATFORM_CORE_COUNT_PER_CLUSTER) 63*91f16700Schasinglulu return -1; 64*91f16700Schasinglulu 65*91f16700Schasinglulu return (cpu_id + (cluster_id * 4)); 66*91f16700Schasinglulu } 67